EN2R--9018 9704R1--NE
6
PERFORMANCE CHARACTERISTICS
Opening time
The first valve (V1) opens in less than 1 second.
The second valve (V2), by--pass valve (Vb) and pilot valve
(Vp) can be either a fast opening valve which opens in less
than 1 second or a characterized opening valve which is
adjustable from 1 up to 30 seconds, at rated capacity.
The opening characteristic is factory set at approximately 6
seconds at the following conditions:
−
measured at 80 % of rated capacity
−
30 mbar supply pressure
−
nominal voltage
−
20
E
C
−
2,5 mbar pressure drop
−
no step pressure
Due to the influence of ambient temperature (--15 ... 60
E
C)
the adjusted opening time of 6 seconds measured at 80% of
adjusted flow rate can vary
+
/
--
4 seconds.
Closing time (V1, V2 , Vb and Vp)
Less than 1 second for all four valves.
Maximum working frequency
1 cycle per minute
Duty cycle
Coil suitable for permanent energization
Operational voltage range
The combination gas valve will function satisfactory between
85% and 110% of the rated voltage.
Design life
Model
Number of Cycles
VQ420AA
600,000
VQ425AA
600,000
VQ440AA
300,000
VQ450AA
300,000